Method of treating rubber rolls



March 16, 1937. w-. KAUFFMAN. 2D 2,073,895

I ER ROLLS Original Filed July 31, 1931 INV NTO ATTORNEYS.

Patented Mar. 16, 1937 t UNITED 'SATES.

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Walter L. Kanflman, II, Eric, 1%.,

Lovell Manufacturing Company,

a :1 f Erie, Pa a corporation of Pennsylvania Application July t1, 1931, Serial No. 554,265 Renewed January 30, 1935 3 Claims. (on. 90-11) In the operation of wringers, particularly where one wringer roll is driven from the other the driving of the driven roll is some times faulty due to the poor tractive engagement of the two 5 rolls. slippage may be caused by a quality of rubber of which the rolls are made. It-is also influenced by the quality of washing fluid which is used ,on the clothes. This washing fluid may have a temporary, or permanent eflect upon the rolls. The present invention isv designed to sur face a rubber roll in such a way as to increase its tractive effect and consequently the possibility of a proper driving of one roll from the other.

, Features and details of the invention will appear from the specification and claims.

A preferredmanner of practicing the invention ishlillgstrated in the accompanying drawing in w c 2o ment.

Fig.2 a side elevation of a wire brush showing a roll as it is operated upon.

Fig. 3 an elevation of a roll partly processed. Fig. 4 a side elevation of the finished roll.

Fig. 5 an enlarged section-on the lines B! in -Figs. 1 and 3.

Fig. 6 an enlarged section on the line H in g. Y r v Fig. 'i an enlarged section, partly in section, of 30 an end of a processed roll.

Fig. 8 a section on the line 8-8 in Fig. 7. l marks the wringer roll body This is formed of rubber and is provided with-a shaft 2, one of the rolls usually being driven by, the shaft and 5 the other of the rolls driven from the driven roll. In Fig. 3 is shown a wringer roll after it has been treated with a single pass by a wire brush 4. Thewire brush is mounted on a stand I and has a guide surlace for assisting in positioning 40 the wringer roll with relation to the brush. Preferably each pass is started away from the end of the roll so as to avoid the direct action of the brush against the end of the roll. 'Ihis action unduly cuts the end 01 the roll and it is, there- 45 fore, desirable to avoid such action. By bringing the surface of the roll into engagement with the brush and drawing the roll against the brush so that the brush passes of! one end of the roll the roll is scored through an area such as shown in mm. 3 with each pass of the roll on the brush. a By shifting the roll rotatively with each pass" Fig. 1 shows a rubber wringer roll before treat-' the entiresurface may be quickly and readily scored and then by reversing the ends of the roll and repeating the operation the scoring oi the entire roll maybe completed. The wire brush in thesecond series of operations starting onthe scored part of therubber seems to follow the small depressions between the ribs formed by the scoring so that the scoring is substantially continuous through the roll. The action of the wire brush, its direct cutting action, the heat more or shown a hand-operated means for accomplishing the scoring. it will, of course, be understood that the process may be carried out by more elaborate mechanical means.

The method is useful in forming new rolls and is alscuseiul in dressing, or surfacing rolls which 'are already in use and which have lost their tractive quality to such an extent asto interfere with the proper action of the rolls.

While I have illustrated the rolls as formed by the method herein claimed I do not claim the rolls per se in this application, such claims being carried into application, Serial Number 554,264.

what I claim'as new is:-

1. The method of treating vulcanized rubber rolls which consists in subjecting the surface of the roll to the scoring action of a wire brush forming shallow. ribs over the squeezing surface of the roll and avoiding the direct action of the brush against the end of the roll. 40

2. The method 'of treating vulcanized rubber rolls which conlists in cutting with a rapidly rotating scoring tool minute grooves in the surface of the rubber longitudinally of the roll.

3..The method of treating vulcanized rubber rolls which consists in cutting with a rapidly rotating scoring tool having a radially extending resilient cutting element minute grooves in the surface of the roll and longitudinally of the rdll.

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